Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.
Richard.
2017-05-11 Richard Biener <rguent...@suse.de>
PR tree-optimization/80705
* tree-vect-data-refs.c (vect_analyze_data_refs): DECL_NONALIASED
bases are not vectorizable.
* gcc.dg/vect/bb-slp-pr80705.c: New testcase.
Index: gcc/tree-vect-data-refs.c
===================================================================
--- gcc/tree-vect-data-refs.c (revision 247881)
+++ gcc/tree-vect-data-refs.c (working copy)
@@ -3957,6 +3957,27 @@ again:
datarefs[i] = dr;
}
+ if (TREE_CODE (DR_BASE_ADDRESS (dr)) == ADDR_EXPR
+ && VAR_P (TREE_OPERAND (DR_BASE_ADDRESS (dr), 0))
+ && DECL_NONALIASED (TREE_OPERAND (DR_BASE_ADDRESS (dr), 0)))
+ {
+ if (dump_enabled_p ())
+ {
+ dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
+ "not vectorized: base object not addressable "
+ "for stmt: ");
+ dump_gimple_stmt (MSG_MISSED_OPTIMIZATION, TDF_SLIM, stmt, 0);
+ }
+ if (is_a <bb_vec_info> (vinfo))
+ {
+ /* In BB vectorization the ref can still participate
+ in dependence analysis, we just can't vectorize it. */
+ STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+ continue;
+ }
+ return false;
+ }
+
/* Set vectype for STMT. */
scalar_type = TREE_TYPE (DR_REF (dr));
STMT_VINFO_VECTYPE (stmt_info)
Index: gcc/testsuite/gcc.dg/vect/bb-slp-pr80705.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/bb-slp-pr80705.c (revision 0)
+++ gcc/testsuite/gcc.dg/vect/bb-slp-pr80705.c (working copy)
@@ -0,0 +1,44 @@
+/* { dg-do compile } */
+/* { dg-require-profiling "-fprofile-generate" } */
+/* { dg-additional-options "-fprofile-generate" } */
+
+extern int isspace (int);
+
+int foo(const char *txt, char *buf)
+{
+ const char *s;
+ char *d;
+ int ws = 1;
+ for (s=txt, d=buf; *s; )
+ {
+ if (*s=='/' && *(s+1)=='/') {
+
+ s += 2;
+ while (*s && *s!='\r' && *s!='\n')
+ s++;
+ }
+ else if (*s=='"') {
+
+ s++;
+ while (*s && *s!='\r' && *s!='\n' && *s!='"')
+ if (*s++=='\\')
+ s++;
+ if (*s=='"')
+ s++;
+ }
+ else {
+ if (*s && !isspace(*s))
+ ws = 0;
+
+
+ *d++ = *s++;
+
+ }
+ }
+ *d = '\0';
+
+ return ws;
+}
+
+/* { dg-final { scan-tree-dump "base object not addressable" "slp1" } } */
+/* { dg-final { scan-tree-dump-not "MEM\[^\r\n\]*__gcov\[^\r\n\]* = vect_cst"
"slp1" } } */
